This is an OPART experiment with a couple of graphics based on Bridget Riley's "Crest" (1964) I got the idea to do this after doing a project for the March Theme for the 2D forum at Renderosity. Bridget Riley explored the concepts of "static" 2D kinetic or optical art by utilising precise mathematical precision in the placement of lines on canvas utilising the visual phenomenon of after-image that exists on the retina when looking at areas of strong contrast. This effect coupled with the móire that comes with closely spaces lines produced an interesting optical effect. I decided to take this further in Flash by juxtaposing another "lines" image above the base one and allowing the viewer to move it my dragging with the mouse. Also both layers change scale over time as the mouse is pressed. Release (mouse) to reset the "experiment" :-)>